issue with top canopy leaves turning yellow then purple

So if been having this issue for a month. Leaves on top of canopy start yellowing and then turn purple from the top of the leaves and works in and from the top of the plant down. I thought the issue was soil PH but I changed my soil and no difference. My environment is ideal. TEMPS- 63-75, HUMIDITY- 45-65%. I feed GH FLORA TRIO and I am in veg. Plants are about 3 months old now from clone. The entire 3 months I have only been feeding the plants the gro and micro with no bloom so they have basically have been getting 6 part nitrogen, 1 part phosphorus, and 6 part potassium. I now think it is a phosphorus deficiency. I have since gave them 2 feedings with bloom and my growth sky rocketed in 2-3 days. Comments please??????

3 month old veg??????? geeeeeez.
how do you change your soil??????
63 degrees is really low. should be 70 minimum. looks like you might be freezing your plants into Molybdenum defs? without pics its impossible to tell.

it looks like this all over the top of my canopy as well as those leaves canoeing or cupping. I figured it out. I feed with 3 part GH FLORA TRIO and I have only been feeding the plant 2 part the micro n gro for about 3 months. The bottles say to use the bloom part in veg as well just at a lower part than the micro n gro but I thought I could get away w.o using it so all this time iv been feeding 6-1-6 and my girls just need more phosphorus Expecially because they were monster cropped (clones cut from flowering plants) which explains the top leaves being affected first instead of the bottom and then working up

Since I have added the bloom part I have noticed a SPIKE in growth and trichome production in vegetative stage

Purpsmagurps said:

3 month old veg??????? geeeeeez.
how do you change your soil??????
63 degrees is really low. should be 70 minimum. looks like you might be freezing your plants into Molybdenum defs? without pics its impossible to tell.

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The only pic you posted is not even a marijuana plant, not sure what to make of it. A picture speaks a thousand words. Yes, your feeding has obviously been way off, but a lack of phosphorus will have necrotic patches that start in the middle and lower half of the plant...a P deficiency does not start at the top of the plant. General purpling like you describe, again, without pics its hard to say, but that purpling will be caused by cooler temps...under 68 degrees, or 19 celsius, it can start with the purple hue coming in.

Blitz35 said:

The only pic you posted is not even a marijuana plant, not sure what to make of it. A picture speaks a thousand words. Yes, your feeding has obviously been way off, but a lack of phosphorus will have necrotic patches that start in the middle and lower half of the plant...a P deficiency does not start at the top of the plant. General purpling like you describe, again, without pics its hard to say, but that purpling will be caused by cooler temps...under 68 degrees, or 19 celsius, it can start with the purple hue coming in.

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well then you didn't read the article I posted where it's proven science that a phosphorus def. can start at the top canopy and I do have neceotic patches... it's not temps. 90% of the time my temps are 70-75 degrees. I know what purpling from cool temps looks like, this is not it. patches of yellow to brown, growth halted, leaves turning lime green then yellow and purple splotching starting and the tips of the leaves and working into the leaf

I will have this proven in about a week when I can say for sure the issue is gone by just adding bloom fert to my feeding schedule

Blitz35 said:

The only pic you posted is not even a marijuana plant, not sure what to make of it. A picture speaks a thousand words. Yes, your feeding has obviously been way off, but a lack of phosphorus will have necrotic patches that start in the middle and lower half of the plant...a P deficiency does not start at the top of the plant. General purpling like you describe, again, without pics its hard to say, but that purpling will be caused by cooler temps...under 68 degrees, or 19 celsius, it can start with the purple hue coming in.

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I think this member is simply trying to help you out some. You didn't have to be so short in your reply...he / she doesn't know what you know or not. We're all here to learn, including those of us who offer advice. I'm glad to see you figured out your problem. I will say, pics of your plant, especially if it exhibits that same sort of purple you posted of that tomato plant, would be neat to see and we all might learn something from it. Never the less, I understand why one might not want to post a pic so no foul there. Good luck and let us know how things turn out.

piffyinajiffy said:

well then you didn't read the article I posted where it's proven science that a phosphorus def. can start at the top canopy and I do have neceotic patches... it's not temps. 90% of the time my temps are 70-75 degrees. I know what purpling from cool temps looks like, this is not it. patches of yellow to brown, growth halted, leaves turning lime green then yellow and purple splotching starting and the tips of the leaves and working into the leaf

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Ok, you know better, again, without pics, it's a waste of time to debate. i was just following what you wrote in your op...temps start at 63..now you say its 70-75..good luck

piffyinajiffy said:

I will have this proven in about a week when I can say for sure the issue is gone by just adding bloom fert to my feeding schedule

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LOL..you're the one asking for help, and it's like you're trying to rub it in that you will prove yourself in a week? lol..whatever..i only posted to help, but you seem lost enough...good luck, im out!